20834651 has 2 divisors, whose sum is σ = 20834652. Its totient is φ = 20834650.

The previous prime is 20834647. The next prime is 20834657. The reversal of 20834651 is 15643802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20834651 - 2² = 20834647 is a prime.

It is not a weakly prime, because it can be changed into another prime (20834657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10417325 + 10417326.

It is an arithmetic number, because the mean of its divisors is an integer number (10417326).

Almost surely, 2^20834651 is an apocalyptic number.

20834651 is a deficient number, since it is larger than the sum of its proper divisors (1).

20834651 is an equidigital number, since it uses as much as digits as its factorization.

20834651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 20834651 is about 4564.4989867454. The cubic root of 20834651 is about 275.1664050715.

The spelling of 20834651 in words is "twenty million, eight hundred thirty-four thousand, six hundred fifty-one".